package com.atguigu.gulimall.product.service.impl;

import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import com.atguigu.gulimall.product.vo.AttrGroupWithAttrsVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.service.AttrGroupService;


@Service("attrGroupService")
public class AttrGroupServiceImpl extends ServiceImpl<AttrGroupDao, AttrGroupEntity> implements AttrGroupService {

    @Autowired
    AttrService attrService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrGroupEntity> page = this.page(
                new Query<AttrGroupEntity>().getPage(params),
                new QueryWrapper<AttrGroupEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public PageUtils queryPage(Map<String, Object> params, Long catelogId) {
        String key = (String) params.get("key");
        LambdaQueryWrapper<AttrGroupEntity> queryWrapper =
                new LambdaQueryWrapper<AttrGroupEntity>();
        if (StringUtils.isNotEmpty(key)) {
            queryWrapper.and((obj) -> {
                obj.eq(AttrGroupEntity::getAttrGroupId, key)
                        .or()
                        .like(AttrGroupEntity::getAttrGroupName, key);
            });
        }
        if (catelogId == 0) {
            IPage page = this.page(new Query<AttrGroupEntity>().getPage(params), new QueryWrapper<AttrGroupEntity>());
            return new PageUtils(page);
        } else {
            queryWrapper.eq(AttrGroupEntity::getCatelogId, catelogId);
            IPage<AttrGroupEntity> page = this.page(new Query<AttrGroupEntity>().getPage(params), queryWrapper);
            return new PageUtils(page);
        }
    }

    /**
     * 根据分类id查出所有的分组以及这些组里面的属性
     * @param catelogId
     * @return
     */
    @Override
    public List<AttrGroupWithAttrsVo> getAttrGroupWithAttrsByCatelogId(Long catelogId) {
        HashMap<Object, Object> objectObjectHashMap = new HashMap<>();
        // 1、查出分组信息
        List<AttrGroupEntity> attrGroupEntities
                = this.list(new LambdaQueryWrapper<AttrGroupEntity>().eq(AttrGroupEntity::getCatelogId, catelogId));
        // 2、查出所有属性
        List<AttrGroupWithAttrsVo> collect = attrGroupEntities.stream().map((group) -> {
            AttrGroupWithAttrsVo attrsVo = new AttrGroupWithAttrsVo();
            BeanUtils.copyProperties(group, attrsVo);

            // 获取所有关联的属性
            List<AttrEntity> attrs = attrService.getRelationAttr(attrsVo.getAttrGroupId());
            attrsVo.setAttrs(attrs);
            if ( attrs!=null){
                return attrsVo;
            }
            return null;
        }).collect(Collectors.toList());
        collect.removeIf(Objects::isNull);

        return collect;
    }

}